| /* |
| * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
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| * |
| */ |
| |
| /** |
| * @test |
| * @bug 6869327 |
| * @summary Test that C2 flag UseCountedLoopSafepoints ensures a safepoint is kept in a CountedLoop |
| * @library /test/lib / |
| * @requires vm.compMode != "Xint" & vm.flavor == "server" & (vm.opt.TieredStopAtLevel == null | vm.opt.TieredStopAtLevel == 4) & vm.debug == true |
| * @requires !vm.emulatedClient |
| * @modules java.base/jdk.internal.misc |
| * @build sun.hotspot.WhiteBox |
| * @run driver ClassFileInstaller sun.hotspot.WhiteBox |
| * sun.hotspot.WhiteBox$WhiteBoxPermission |
| * @run driver compiler.loopopts.UseCountedLoopSafepointsTest |
| */ |
| |
| package compiler.loopopts; |
| |
| import jdk.test.lib.Platform; |
| import jdk.test.lib.process.ProcessTools; |
| import jdk.test.lib.process.OutputAnalyzer; |
| import java.util.List; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collections; |
| import jdk.test.lib.Asserts; |
| |
| /* Idea of this test is to check if ideal graph has CountedLoopEnd->SafePoint edge in case |
| of UseCountedLoopSafepoint enabled and has no such edge in case it's disabled. Restricting |
| compilation to testMethod only will leave only one counted loop (the one in testedMethod) */ |
| public class UseCountedLoopSafepointsTest { |
| |
| public static void main (String args[]) { |
| check(true); // check ideal graph with UseCountedLoopSafepoint enabled |
| check(false); // ... and disabled |
| } |
| |
| private static void check(boolean enabled) { |
| OutputAnalyzer oa; |
| try { |
| oa = ProcessTools.executeTestJvm("-XX:+UnlockDiagnosticVMOptions", "-Xbootclasspath/a:.", |
| "-XX:" + (enabled ? "+" : "-") + "UseCountedLoopSafepoints", "-XX:+WhiteBoxAPI", |
| "-XX:-Inline", "-Xbatch", "-XX:+PrintIdeal", "-XX:LoopUnrollLimit=0", |
| "-XX:CompileOnly=" + UseCountedLoopSafepoints.class.getName() + "::testMethod", |
| UseCountedLoopSafepoints.class.getName()); |
| } catch (Exception e) { |
| throw new Error("Exception launching child for case enabled=" + enabled + " : " + e, e); |
| } |
| oa.shouldHaveExitValue(0); |
| // parse output in seach of SafePoint and CountedLoopEnd nodes |
| List<Node> safePoints = new ArrayList<>(); |
| List<Node> loopEnds = new ArrayList<>(); |
| for (String line : oa.getOutput().split("\\n")) { |
| int separatorIndex = line.indexOf("\t==="); |
| if (separatorIndex > -1) { |
| String header = line.substring(0, separatorIndex); |
| if (header.endsWith("\tSafePoint")) { |
| safePoints.add(new Node("SafePoint", line)); |
| } else if (header.endsWith("\tCountedLoopEnd")) { |
| loopEnds.add(new Node("CountedLoopEnd", line)); |
| } |
| } |
| } |
| // now, find CountedLoopEnd -> SafePoint edge |
| boolean found = false; |
| for (Node loopEnd : loopEnds) { |
| found |= loopEnd.to.stream() |
| .filter(id -> nodeListHasElementWithId(safePoints, id)) |
| .findAny() |
| .isPresent(); |
| } |
| Asserts.assertEQ(enabled, found, "Safepoint " + (found ? "" : "not ") + "found"); |
| } |
| |
| private static boolean nodeListHasElementWithId(List<Node> list, int id) { |
| return list.stream() |
| .filter(node -> node.id == id) |
| .findAny() |
| .isPresent(); |
| } |
| |
| private static class Node { |
| public final int id; |
| public final List<Integer> from; |
| public final List<Integer> to; |
| |
| public Node(String name, String str) { |
| List<Integer> tmpFrom = new ArrayList<>(); |
| List<Integer> tmpTo = new ArrayList<>(); |
| // parse string like: " $id $name === $to1 $to2 ... [[ $from1 $from2 ... ]] $anything" |
| // example: 318 SafePoint === 317 1 304 1 1 10 308 [[ 97 74 ]] ... |
| id = Integer.parseInt(str.substring(1, str.indexOf(name)).trim()); |
| Arrays.stream(str.substring(str.indexOf("===") + 4, str.indexOf("[[")).trim().split("\\s+")) |
| .map(Integer::parseInt) |
| .forEach(tmpTo::add); |
| Arrays.stream(str.substring(str.indexOf("[[") + 3, str.indexOf("]]")).trim().split("\\s+")) |
| .map(Integer::parseInt) |
| .forEach(tmpFrom::add); |
| this.from = Collections.unmodifiableList(tmpFrom); |
| this.to = Collections.unmodifiableList(tmpTo); |
| } |
| } |
| } |